CN201259805Y

CN201259805Y - Insulation disk for current mutual inductor

Info

Publication number: CN201259805Y
Application number: CNU2008202332336U
Authority: CN
Inventors: 吴春风; 张逢春; 潘滨; 袁刚
Original assignee: TAIKAI MUTUAL INDUCTOR CO Ltd SHANDONG
Current assignee: TAIKAI MUTUAL INDUCTOR CO Ltd SHANDONG
Priority date: 2008-12-30
Filing date: 2008-12-30
Publication date: 2009-06-17
Anticipated expiration: 2018-12-30

Abstract

Disclosed is an insulating disc which has the functions of fixing, sealing and preventing a four-turn primary conducting rod of a high-voltage current transformer from rotating. The insulating disc is cast from epoxide resin(can also be processed from other insulating material). Four conducting rod fixing holes are symmetrically distributed on a round conducting disc; the front ends of the holes are round for the convenience of installing gasket rings; and the back ends of the holes are square for the convenience of fixing the conducting rod, so that the conducting rod can not rotate along the circumferential direction.

Description

The current transformer insulating disc

(1) technical field

The utility model is a kind of fixing device that reaches anti-rotation of outdoor AC gas insulated high voltage current transformer Primary Conductor that is used for 126～252kV electric power system.

(2) background technology

Current transformer will be subjected to the impact of short circuit current in the running of electric power system, so the current transformer Primary Conductor must have enough abilities of bearing short circuit current heat effect and mechanical force.The gas insulated high voltage current transformer of traditional single turn (or two circles) structure can be fixed with an end, and the other end is realized above-mentioned functions with the method that insulating case supports.There is the power consumer of quite a few to need little current ratio instrument transformer at present, guarantee the precision insulation level constant prerequisite under, both economical reasonable manner is exactly a umber of turn (being generally 4 circles) that increases current transformer, but when adopting many parallel constructions as the fruit product Primary Conductor, reach reliable and stable fixed support is promptly arranged, in order to bear short circuit current heat effect and mechanical force, guarantee that again turn-to-turn must not short circuit and excellent sealing performance is arranged, traditional fixed form just is difficult to realize above-mentioned functions.

(3) summary of the invention

The purpose of this utility model is the device of fixing, seal and prevent its rotation of the high-tension current inductor Primary Conductor of a kind of solution of design four circle structures, the current transformer insulating disc.

The technical scheme in the invention for solving the technical problem is: designed a kind of round insulation dish with the epoxide resin material moulding by casting, gross thickness 40mm is fixed on the current transformer upper end with the metal trim ring.Four cross sections that are symmetrically distributed in the middle of the insulating disc be Primary Conductor (abbreviation conducting rod) fixing hole of circle, and the internal diameter in hole is decided according to the actual size of conducting rod and sealing ring, and four direction designs four platforms that 10mm is dark respectively up and down in the rear end in hole; End section is circular and installs two " 0 " RunddichtringOs additional before the conducting rod of Pei Heing with it, thereby play the dual-seal effect, at distance conducting rod front end 51.5mm place, with conducting rod up and down four direction mill out four and be the platforms about 10mm deeply, after conducting rod is inserted the current transformer insulating disc, four platforms on this platform and the current transformer insulating disc matches, and so just can guarantee that conducting rod can along the circumferential direction not rotate.With conducting rod, after insulating disc and trim ring assembling are finished, install busbar additional in the conducting rod end again, guaranteeing can also to guarantee that axial displacement does not take place conducting rod on the equipotential connection basis.

The beneficial effects of the utility model are, when power consumer required must use once to be the current transformer of four circle structures, what a whole set of Primary Conductor was provided fixed the measure that seals and prevent to rotate.It is simple in structure, is easy to draw materials, convenient processing.All there is the insulated product job shop of oneself in general high voltage electrical equipment manufacturing enterprise, behind the input mould, and can this type of insulating disc of large batch of production.

(4) description of drawings

Fig. 1 is insulating disc structural map (front).

Fig. 2 is the profile of Fig. 1 along the A-A cross section.

Fig. 3 is the partial enlarged drawing of Fig. 2.

Fig. 4 is insulating disc and conducting rod assembling schematic diagram.

Among the figure, 1. conducting rod, 2. " O " RunddichtringO, 3. the current transformer body, 4. insulating disc, 5. busbar, 6. " O " RunddichtringO, 7. trim ring

(5) embodiment

Below in conjunction with drawings and Examples installation and processing of the present utility model and use are further specified.

Fig. 1 has shown the insulating disc architectural feature, and insulating disc (4) is used the epoxide resin material moulding by casting, and gross thickness 40mm goes up four the conducting rod fixing holes that are symmetrically distributed at discoidal insulating disc (4).Fig. 3 is the cutaway view of Fig. 2 on the A-A cross section, Fig. 4 is the partial enlarged view of Fig. 3, in Fig. 4, can clearly show, conducting rod fixing hole right side is the circular section, guarantee when the conducting rod (1) that " O " RunddichtringO (6) is housed inserts, playing good sealing function, is square in the cross section, left side in hole, and the rotation of circumferencial direction can not take place behind assurance conducting rod (1) the insertion insulating disc (7).

In Fig. 1, conducting rod (1) has been gone up suit and has been inserted in the insulating discs (7) behind two " O " RunddichtringOs (6), and this design can guarantee that every conducting rod does not leak; Insulating disc (4) is fixed on the current transformer body (3) by trim ring (7), between the body (3) and insulating disc (7) " O " RunddichtringO (2) is arranged, and the insulating gas in the product is not leaked from here.

Claims

1. a current transformer insulating disc is formed by the outdoor type poured with epoxy resin, it is characterized in that: insulating disc is for circular, and symmetry is processed four conducting rod fixing holes thereon, and the front end in hole is circular, and the rear end is a square.